Box with laminated corrugated collar



p 7, 1966 c. L. DORNBUSH ETAL 3,275,217

BOX WITH LAMINATED CORRUGATED COLLAR Filed Nov. 25, 1964 2 Sheets-Sheet1 //V|/E/VTOR5 CLINTON L.D0/?/VBU5H WARD h. FRANC/LLO/V BY ATTORNEYSSept. 27, 1966 c. 1... DORNBUSH ETAL 3,275,217

BOX WITH LAMINATED CORRUGATED COLLAR 2 Sheets-Sheet 2 Filed Nov. 25,1964 m w 0 TN/ o G NON WDA ATTORNEYS United States Patent Office3,275,217 Patented Sept. 27, 1966 BOX WITH LAMINATED CORRUGATED COLLARClinton L. Dornbush, Palo Alto, and Ward H. Francillon,

San Jose, Calif., assignors to Georgia-Pacific Corporation, Portland,reg., a corporation of Georgia Filed Nov. 25, 1964, Ser. No. 413,818 2Claims. (Cl. 229-37) This invention relates to a box with a laminatedcorrugated collar and to a novel method for its manufacture.

When boxes made of corrugated paper contain foods or other heavymaterial and are stacked high on top of each other, considerablepressure is exerted on the side walls of the bottom and lower boxes ofthe stack. One object of the present invention is to increase thestacking strength of such boxes.

Loose collars or liners have been used heretofore; a four sided stripcreased to match the inside dimensions of the box has been placedloosely in a slip fit against the inside of the box to help the sidewalls support weight, and such strips have given a substantial increasein stacking strength, sometimes doubling it. However, the presentinvention distinguishes from the use of loose collars in severalimportant ways, one of which is that the collar is laminated in place bybeing glued to the side walls of the carton. We have found that thislamination results in ten of twenty percent more strength than loosecollars. In fact, when the invention was actually tried, a glued-incollar of the type of this invention weighing only 115 pounds perthousand square feet gave 10% more stacking strength than a loose collarthat weighed 132 pounds per thousand square feet and was, therefore, initself, stronger. The glued collar was generally of the same type ofcorrugated construction and its flutes were, if anything, weaker thanthose of the loose collar and yet, due to the laminated construction ofthis invention, the resulting box had substantially more strength. Thisnovel and surprising result is obtained in a simple way which in the endresults in decreasing the cost of the box in comparison with the boxhaving a loose liner.

The novel method of this invention provides a better product at the sameor lower cost. It provides a novel securing-together of the box; thecollar, glued to the box blank, is offset and has a free end that isalso glued to the box blank to secure the box together, both the KDF(knocked-down-flat) unit and the completed box.

Several other objects and advantages of the invention will appear fromthe following description of a preferred form of the invention.

In the drawings:

FIG. 1 is a view in perspective of an open box embodying the principlesof the invention.

FIG. 2 is a view in perspective of a box blank with an offset liner thatwill form the collar, the liner being laminated in place by being gluedto the box blank.

FIG. 3 is a plan view of the box in its knocked-downflat or KDFposition, with portions broken away and portions shown in section.

FIG. 4 is a view in perspective of the closed box.

FIG. 5 is an enlarged view in section of a corner of the box showing howthe liner holds it together.

The box of this invention incorporates a standard corrugated paper boxblank 11 and uses a blank 12 to make a collar 13 of corrugated materialwhich is glued to the box blank 11 and acts to hold the box together.

The box 10 can probably best be appreciated in reference to the novelmethod of its manufacture. Thus, FIG. 2 shows the blank 11, comprisingcorrugated doubleface paper having slots 14 dividing the bottom flaps 15and slots 16 dividing the lid flaps 17 and having creases 18 and 19dividing the flaps 15 and 17 from the side walls 20. Creases 21, in linewith the slots 14 and 16 mark the fold lines for the side walls 20. Tothe blank 11 is glued the flat strip 12 which at the time of gluing maybe Without notches or creases but does overlie the side walls 20 fromthe creases 18 to the creases 19. The strip 12 is offset relative to thebox blank 11, leaving a space 22 on one end and providing an overhangingflap 23 at the other end. The glue 24 (see FIG. 5) is preferablydistributed Widely or fully over the mating faces of the strip 12 andthe side walls 20. It does not matter whether the glue be applied to thebox blank 11 or to the reinforcing strip 12.

Next, the strip 12 is creased to provide creases 21a in line with thecreases 21 and slots 14 and 1-6 of the box blank 20, so that thelaminated assembly can be folded. In assembling the box to itsknocked-down-flat or KDF condition 25, FIG. 5, glue may be applied tothe overhanging flap 23 or on the uncovered space 22 of the box wall andthe box blank and strip assembly are folded so that the flap 23 issecured to the wall 20 at the space 22. Note that in the KDF positionfor shipping, the flap 23 is located intermediate the double-reinforcedends 26 and 27, which are at the ends. Closure tape therefore need notbe and ordinarily is not used, though it may be used, if desired.

The box 10 is readily set up in the normal manner by opening the KDFbox, folding and gluing or stapling or otherwise securing the bottomflaps 15, then filling the box 10 and closing the top flaps 17 in thenormal way, using glue or staples as desired.

The main walls 20 of the box 10 are substantially doubled in thicknessand they are more than doubled in their ability to stand stacking,partly because the glue bond itself adds stiffness and strength to thecorrugated paper as well as securing the two pieces together. Bysecuring it together, manufacture is made simpler, because it ispossible to manufacture the KDF box on an assembly line basis with theglue being applied to either the box blank 11 or the reinforcing blank12 and then being processed by machinery from thereon, rather thanhaving to insert each liner into the box by hand at the time that thebox is set up.

To those skilled in the art to which this invention relates, manychanges in construction and widely differing embodiments andapplications of the invention will suggest themselves without departingfrom the spirit and scope of the invention. The disclosures and thedescription herein are purely illustrative and are not intended to be inany sense limiting.

We claim:

1. A box comprising a parallelepipedon box of double-faced corrugatedpaper which side walls and top and bottom flaps and a double-facedcorrugated paper collar the same height as said walls and of the sameperimeter as that of the Walls and glued to said walls,

said strip being offset relative to the ends of the side walls of saidbox, to provide a short flap bridging across the end edges of the boxside walls and closing the edges of said box.

2. A reinforced box comprising a box of double-faced corrugated paperhaving side walls and a double-faced corrugated paper collar strip thesame height as said walls and of the same perimeter as that of the wallsand glued to said walls, said collar strip being offset at its endsrelative to said side walls to provide a short glue flap extendingacross and closing the side edges of said box without increasing thethickness of any portion beyond the sum of the thickness of said sidewalls and a single thickness of said collar strip.

(References on following page) References Cited by the Examiner UNITEDSTAT ES PATENTS Jones.

Bird '22923 5 Harbeck.

Schroeder et a1. 22937 Enzie 22937 Bronte et a1. 22937 X ReferencesCited by the Applicant UNITED JOSEPH R. LECLAIR, Primary Examiner. G. O.RALSTON, Examiner. Larson 22937 X 10 D. T. MOORHEAD, Assistant Examiner.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORREC'QION Patent N00 327s,217 September 27, 1966 Clinton Lo Dornbush et ale It is herebycertified that error appears in the above numbered patent requiringcorrection and that the said Letters Patent should read as correctedbelow.

Column 1, line 28, for "of" read to column 2, line 53, for "which" readwith o Signed and sealed this 29th day of August 1967@ (SEAL) Arum:

ERNEST W. SWIDER EDWARD J. BRENNER Attesting Officer Commissioner ofPatents

1. A BOX COMPRISING A PARALLELEPIPEDON BOX OF DOUBLE-FACED CORRUGATEDPAPER WHICH SIDE WALLS AND TOP AND BOTTOM FLAPS AND A DOUBLE-FACEDCORRUGATED PAPER COLLAR THE SAME HEIGHT AS SAID WALLS AND OF THE SAMEPERIMETER AS THAT OF THE WALLS AND GLUED TO SAID WALLS, SAID STRIP BEINGOFFSET RELATIVE TO THE ENDS OF THE SIDE